Amateur radio dipole

Dipoles are widely used on bands like 80 metres, 40 metres, 20 metres, 15 metres and 10 metres where they can provide excellent levels of performance. A dipole antenna can be a very effective antenna, providing a good level of performance especially if it is erected as high as reasonably possible and away from obstructions, etc. Building am HF ham band dipole does not have to be expensive. Often the items needed can be salvaged from previous antennas, or bought for relatively small cost.
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Dipole antenna

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Ham Radio Dipole Antennas: tm-kirov.ru

The ham radio dipole is called a half-wave antenna because its length corresponds to an electrical half wave at the frequency for which it is intended. This Page Covers 1. Antenna System 2. Dipole Formula 3. Resonant Length 4. Transmission Line 5.
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Ham Radio Dipole Antennas

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In radio and telecommunications a dipole antenna or doublet [1] is the simplest and most widely used class of antenna. Each side of the feedline to the transmitter or receiver is connected to one of the conductors. This contrasts with a monopole antenna , which consists of a single rod or conductor with one side of the feedline connected to it, and the other side connected to some type of ground. The dipole is the simplest type of antenna from a theoretical point of view. If the feedpoint of such an antenna is shorted, then it will be able to resonate at a particular frequency, just like a guitar string that is plucked.
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